Longer theoretical length of cut in whole-plant sorghum silage increased feed intake and starch digestibility in growing beef steers

Lay Summary Sorghum silage is a resilient forage crop used widely in beef production, particularly in water-limited environments, yet questions remain regarding the best way to harvest it to maximize nutritional value. This study investigated how the chop length of the plant during harvest affects the performance and digestion of growing beef steers. Two diets were compared: one containing sorghum silage chopped at a short length (7.5 mm) and another at a longer length (15 mm). Surprisingly, steers fed the longer-cut silage ate more feed and digested starch better than those fed the shorter-cut silage. Although both groups gained weight at the same rate, the improved starch digestion suggests that larger particles may possibly contribute to a better rumen mat formation when using standard harvesting equipment. These findings indicate that producers using conventional processors may optimize energy availability and feed intake by choosing a moderate chop length (15 mm) rather than cutting the forage too finely.